/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchy.h
Sets a control's preferred rotator (local transform rotation)
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=URigHierarchy) void SetControlPreferredRotator ( [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InKey, const FRotator & InRotator, bool bInitial, bool bFixEulerFlips )